8PSH image
Entry Detail
PDB ID:
8PSH
Keywords:
DNA-RNA HYBRID
Title:
HIGH RESOLUTION NMR STRUCTURE OF THE STEREOREGULAR (ALL-RP)-PHOSPHOROTHIOATE-DNA/RNA HYBRID D (G*PS*C*PS*G*PS*T*PS*C*PS*A*PS*G*PS*G)R(CCUGACGC), MINIMIZED AVERAGE STRUCTURE
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
1997-10-13
Release Date:
1998-05-27
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
50
Conformers Submitted:
1
Selection Criteria:
AVERAGE OF ALL STRUCTURES
8PSH validation report
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Description:DNA (5'-D(*DGP*(SC)P*(GS)P*(PST)P*(SC)P*(AS)P*(GS)P*(GS))-3')
Chain IDs:A
Chain Length:8
Number of Molecules:1
Biological Source:
Polymer Type:polyribonucleotide
Description:RNA (5'-R(*CP*CP*UP*GP*AP*CP*GP*C)-3')
Chain IDs:B
Chain Length:8
Number of Molecules:1
Biological Source:
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
AS A DA ?
GS A DG GUANOSINE-5'-THIO-MONOPHOSPHATE
PST A DT THYMIDINE-5'-THIOPHOSPHATE
SC A DC 2-DEOXY-CYTIDINE-5'-THIOPHOSPHORATE
Ligand Molecules
NA
Primary Citation
Structure of a Stereoregular Phosphorothioate DNA/RNA Duplex
Nat.Struct.Biol. 5 271 276 (1998)
PMID: 9546216 DOI: 10.1038/nsb0498-271

Abstact

In this work, we present the first NMR solution structure of a DNA/RNA hybrid containing stereoregular Rp-phosphorothioate modifications of all DNA backbone linkages. The complex of the enzymatically synthesized phosphorothioate DNA octamer (all-Rp)-d(GCGTCAGG) and its complementary RNA r(CCUGACGC) was found to adopt an overall conformation within the A-form family. Most helical parameters and the sugar puckers of the DNA strand assume values intermediate between A- and B-form. The close structural similarity with the unmodified DNA/RNA hybrid of the same sequence may explain why both the natural and the sulfur-substituted complex can be recognized and digested by ribonuclease H.

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Primary Citation of related structures
8DRH